The language update means that users who change their default language on the iPhone to Japanese, German or Portuguese will see the app in that language. We anticipate the release is a reactionary move to serve the app's growing base of international users; founder Kevin Systrom tells us more languages are still to come.
Today's update also allows users to post to social sites after the initial upload and is also said to include bug fixes, photo-taking performance improvements and better follower/following list support.
With the addition of Posterous, Instagram now enables users to share their mobile photos instantaneously or after the fact, with five total services (not including Foursquare). This puts the app on par with Picplz, which just enhanced its service last night to add Posterous, Flickr and Tumblr.
The back-to-back releases point to an ongoing battle between the two services and — at least for now — it's a rivalry that will play out nicely for users looking for additional features. Hopefully, this means we can also expect to see the dueling parties add more filters in the near future.
